reference / interface
tab
One page of tabs, with its name on the tab. The widgets inside are made only while it is the page showing, and keep their values apart from the other pages.
size = 40ui [ tabs [ tab "size" [ size = slider "size" 10 100 start 40 ] tab "about" [ label "tabs keep their own values" ] ]]draw [ circle at 300 160 radius size ]
How to write it
tab text [ ... ]